Elmo Rietschle 2FC4...-1CB - Manual (Page 36)

7 Parameters
610.00260.40.000 · 05.2014 36 / 74 © Gardner Denver Deutschland GmbH
Parameters
In this chapter, you will find
▪ an introduction to the parameters
▪ an overview of the most important commissioning and operating parameters
Safety instructions for handling the parameters
WARNING
Risk of injury from restarting motors!
The non-observance of warnings can result in severe bodily injury or sub-
stantial property damage.
 Certain parameter settings and the changing of parameter settings during
operation can cause the drive controller to restart automatically after a power
failure, or cause undesirable changes in the operating characteristics.
If parameters are changed during operation, it may take a few seconds be-
fore the effect becomes apparent.
General information on parameters
Explanation of operating modes
The operating mode is the instance in which the actual setpoint value is gener-
ated. This is a simple conversion of the raw input setpoint value into a speed set-
point in the case of the frequency setting mode and control of a specific process
variable by comparing the setpoint and actual values in the case of the PID proc-
ess control.
Frequency setting mode:
The setpoints from the "setpoint source" (1,130) are rescaled into frequency set-
points. 0% corresponds to the "minimum frequency" (1,020), 100 % corresponds
to the " maximum frequency" (1,021).
The prefix of the setpoint is the decisive factor in rescaling.
PID process control:
The setpoint for the PID process controller is read as percentage in the "frequency
setting mode" operating mode. 100% corresponds to the working range of the
connected sensor, which is read from the actual value input (selected by the "PID
feedback").
Depending on the control deviation, a speed controller output is issued at the con-
troller output, based on the amplification factors for the P component (3,050), I
component (3,051) and D component (3,052). In order to prevent the increase of
the integral component to infinity in the case of uncontrollable control deviations,
it is also limited to the controller output threshold when reaching the same (corre-
sponds to "maximum frequency" (1,021).
7
7.1
7.2
7.2.1